Centrifugal pump.



W, ROSS CENRtFHGM. PUMP APPLICATAGN man MAR. 12. 1917.

,QQ Patented Fb.11,1919.

2 'SHEETS-SHEET l.

Wk ROSS.

cENmFuGAL PUMP.

APPLICATION FILED MAR. I2. 19H.

Patented Feb. 11, 1919 2 SHEETS-SHEET 2.

WILLIAM RUSS, OF SGUTH PORCUNE, ONTARG, A'K'D.

CEN'IBEFUGAL PUMP.

Specification of Letters Panen'c.

Appiicam fue@ March 12, isis'. semi no. 154.222.

To @ZZ 'wwm it may ommen/n -Be it known 'that I, lvVumAM Ross, of South Pqrrcupine, in the Province of 'Untalro, Canada, .have invented certain new ,and useful. rnprovements .in Centrifugal Pumps, owhich the follnwin'g is zi speen.

dom 'from wear and to make all parts ssp@ cinlly lidble bo wear readily neces-'sible and. removable for repairs or replacement,

I uziin :ny objecls by means nf the mnstruclzins hereinafter described and illustrated in the accompanying drawings in which* Figure l is n vertical section of :i pump constructed in accordance with my invention;

Fig. 2 a plan view me die saine;

Fg.. 3 :xn end elevation nl tine sume;

Fig, 4 an enlarged sectional ileziil ilimitiminp; the pac-king for the joint vliemeen the in'ipeller and pleasure easing; y

Fig. 5 :in elevation, partly in seelinn nl :i double pump;

a -plan View 0f the same;

ldig. 7 similar View showin'f ai modification Of the connections;

Fig. 8 a longitudinali section ci a merlin caon of the, arrangement of lie double pump; and

Fig, 9 n vertical lmigitnrinnll semen m" ai modification if the construction shown in Wirf, -h

In 'lle drawings like numerals of roll-1' ence indicare cmrespnnclmg; pars in lle cliifeient figures.

with the end covers 7.

Euch emi over irs px'oviilml will; :i Stull* ',ing bini H consti-Hotell snlisl'zintiilly mi lim-einafter. described. The ends of "ilw, paris o the shaft 3*4 are secured mgehm by a slim-.1

coupling sleeve 9., lie'ends of lille pars of (ille schaff, being threaded to Seew into lli@ sleeve.

0n this sleeve 9 is moimed the impellez l() of any suimble type- :md pi'miiieil al. one er lmtli sides willi iiivinle eye ll.

For use with iluids having gritty metter in mispeniom it is neeessazy l@ make. the impeller of very hard material, which, there foret.. is not i'ezulily maeliinefl.' hul) of the impeller is Niere/fore provided willi. a. soft metal mi'e i2, which can 'eznlily be lmx'ml. ln'gvsezxlied :nifl {iefl on the sleeve 9. The smiling boxes 8 ai'e siiniizizly c0n- Srncml.

lach pnl-l, the riliuff 3mis pinvied willi a renewable- 'piotecting sleeve 13. Jilliin lh@ gluliingglinx is fitted ilfiemovable neel-z 'ring lll. The gland peeking l5 placed williiif ille Shilling' bex wel' ille neck ring' l, and engaged by 'ille gland 1G.

l? is; a .gland flange having ennzict 'ny means of a -lmll :and soeket joinf; "with the und of lle gland. Bolts 18 coxmefing the flange :incl ilie am? pi'mide means im* lightening tlw pieliings. (Ewing 'le lle of the. ball and sock-et je; ming of lie. helle will mi of .1i nem il', A 1". vided .fn-: ln'liiiezil' Animal, T', peli essingf?. ThisI casing.; Er im'nl Siiown :ind is rele bly nel limi within lie. 11min @using pz'ee ably by n'ieans 0f a pluizzlij; of .5i-.WHW El l liiorigli lilie periphery (if iii-:i main nml engajgi *elle peipliery nl lle im' wel Y.

, ninin easingp-"niilei'l willi lie in- .2 mul tlc :gi-let 33. which emxzmnnieales willi the ,el if #The premura (raising als in 291;. :5. To preteen ne milenio? of the. ixnpeller fimn eonict will; ille. weten in lie main easing, l provide' lle pressure casing with elle-eli members zel, which nre preferably fomned sepziraie 'from lille cursing :ind are applied therein :is shown, being provided wii'li lips, Q5 enf fing ille miler eide of the piefssm'e easing .ns defining the posiien of the cheeks nell'. ve clieeto- These cheeks zii-e remm'ully l lrl in place e preferably by means of scmws threaded lill through the cover plates 7 Oli the main casing. lhere must, otl course, he a free running peripheral joint between the, impeller and the stationary member in close proximity to which it rotates. In the presentease, the joint being between the inipeller andthe pressure casing. or more properly the cheek nieinher forming part of the easing, to keep this joint tight withoutl undue wear I therefore provide the following )aeking means. An annular recess formed in one of the relatively movable parts, preferably the impeller as shown in Fig. 4, and in this recess is loosely fitted a packing ring E27. Pressure from within the impeller will act against the side of this` ring to crowd it against the far side ot' the annular recess, and thus maintain a tight lateral joint. Further, the pressure can ret beneath the ring and `ress it Out:- wardly against theI face of the c leek or pressure casing with which itl contacts. An absolutely tight joint; is thus readily insured. The packing rinet may he either simple or 0f a piece wound in s )iral forni.

(.onsiderahle dilliculty is experienced in centrifugal pumps in excluding grit'. from the shat't. neck rintefs.v gland packings and glands hereinhefore ret'erred to, and l have devised novel means for minimi/.ingJ the acccssihility ot' grit to these parts.

llet'errine particularly to Fig. l, il; will he seen'that the liinpeller at the inner le of the eye at each side is provided with an. axiallv and radially directed extension which terminates in a dish 2l). which prefierahlv extends into an annular chandwr 55u in the side ol thi: main casinf. and preferahlv Formed in 'the lace ot' the stalling linx which t'orins part of the end cover ol' the casing. lnto this annular ehaniher water is introduced through a pipe ill. which water majY he under pressure so as to cause an outward flow around the edges of the disk 125i. rl`he dis-lt ll will prelierahl;Y he provided with vanes Zhi. which. when the im peller is in rotation. will tend to draw water through the pipe Ill and expel it around the edge ol the. disk '.tl under pressure. When such vanes are employed it will he seen that. it is not essential that the water through the pipe ll he supplied under pressure. With this arrangcna-nt it is practically impossihle Vl'or grit to olitain access to the. haring surfacesI ot' the pump.

'l`he mode ol' operatioi'i ol the pump will he readily understootl from the ahove de-l scription. hut the method of obtaining' aecess to and of removing the worhing parts requires some further explanation.

The outer end of the shaft l is provided with a hole lil into which a har can he inserted and the .shalt -t rotated while the sha l't 2l is held from rotation h v the engage-` ment of its pulley 5 with a drivingr hell. 'lhe sha l't t may thus he unscrewed from its right hand inlet 2;).

engagement with the couplingr sleeve ll. The shaft may then he pushed endwise until it. is clear ot' the stallingr hox and gland. 'l`he cover 7 is then easily removed together with the stuffing box and gland. rl`he outer cheek 24 may then he lifted out and the inipeller and coupling sleeves screwed otl1 the shaft 3. The pressure easing may easily he removed by releasing one of the screws :t1 and with it will come the inner cheek piece il. By reversing the operation the parts are easil)r reassembled.

It will be understood, ot' course. that any of the parts in contact with the lluid and its suspended grit may he supplied with detachahle liners such as commonly employed.

In Fig. '5 I show a double pump eou- 'structed in accordance with my invention,

the main pump easing heilig divided hy a iartition, and an impeller and pressure cas ing provided at each side ol the partition. If the pumps are to he used in series, the outlet 23 of the pump at one side ot' the casing is connected with the inlet 2:! ol the pump at the other side ol the casingi hy means of a pipe 255. In Fie". T lI show an arrangement ol the connectionsh v means ot' which the pumps may he used either in. parallel or in series. Al. suction pipe lt is ln'anched to connect with the inlets .52 to the main pump raisin". and a discharge pipe ill' is luanched to conm-rt with the outlets .ll'l. 'l'hev pipe :l5 is' employed connected as shown in hi; l.

ln the pipe lf is located a raivc Ilh. and valises lfl and lll are provided controlling respectively tln` hranches oli the discharge pipe lli to the lei't hand outlet :2li and the hranch nl' the suction pipe Btl leading to the when the valve Ils is ola-n and the `'alves ltl and vttl closed. the pumps operate in series. ll'hcn the valve ils .is closed and the valves ISU and lll open the pumps operate in parallel.

Vln litr. S l .show a uimlilication ot' the donhle pump in which the impeller has au cyr. at each side and isprovided with a douhle dischargnleadingr to a douhle pres-- sure casing' t2. and in which the partition lil dividing the main pump casing.' is formed as part olr the pressure casing` Fluch a pump ma); he operated il desired according to the arraneenients shown in Figs. t` and 7.

ln Fig. El l show an arrangement in which the iinpeller is provided with an c ve :it one side only. show also iu this ligure a remorahll tred pipe ll. which leads iroin the inlet el the main casing lo the eve nl' the inipeller. and is held in position livr means lol' a) screw t3 screwed through the end cover ol the casinltrj. Huch a leed pipe may. ol course` easily he eniphrved also willi an impeller having' au eve at cach side. This leed pipe is particularly useful in *moving lluids containinlcf large stones` gravel and ...s Limi-MM.

lOl

the like, and may be omitted when uis eoneiiiing eoiiipeietiveiy simili pm'icies in suspeneion seing movefl.

ein@ e giefriprieiei diseheige; undivided.

ie @ming when ifee siii@ comi' is i'emme,

2, n a eemi J i pump, the eomiiiietioii of en impeiei Wifi: en iiiiet eye at each side :imi a peipiae disehaege; e fgeessme eas-- suieemiiegiie peiipheiy oi". ihe iinipvexiei' ami pi'mided iviii e suiizibie die .eimi'geg ai pump easing forming Suction ciiiimber sui'rouniiigthe impeiei: and pi-essure easing and provided. with an miei; opeei'rig and with as, disharge opening communieating 'wiii Ehe discharge of the pref-,eure ces ing; :in impeiiei' shaft extending into ich-e ce sing; meer@ mi Teiixovabij. siippoi'tiiig tim p'eseiirev within the pumpesiiig; tiemovabie? euizvbiy heid, sziionary cheek pieee each siiie the pic/Sure coef' ing :1mi poeoiing ille iiiipeler; am; e. 'fe-l momble end ,cover the pump casing iii-e prefigura :mii impeiieir being femombie through the @mi of -fie easing when @he seid cove" eiiioved. y

3. fn a, centrifugal pump, eombiiietion of? im impl-Hei? with ine eye ai. each sieie emi. e peiipi iisdmi'g'e; pressure easing; surrounding, the periphery off pelleand. povifief *fh e suiizabie fis charge; a, pump erxiiingg a euoiifm chamber sui'i'oimdingg' iie impeiie nini pressure casing and pi'ovide Wiii an inet opening in. the piane of the impeier und e disohofgo opening communicating with the fischzii'ge of the press-aie owing; en iiiipeiier Shaft extending; tiiiough each eni'l of he eesingg' means for removably suppoming the pressure easing Within the pump easing; si. removable siaitionary cheek pieee at eiieii side engaging 'the pressu're caving and proteetog the impeieif; means engaging the 'eeeeii pieces emi die pump Casing foi hoi@ die cheek pi s in piece; lable cove?? im die pump easing., 'pi =s Seife-seeing ami imiieieif heie' femoveiie iuough the end of the casing when the said cover is removed.

L. En :i centrifugal pump, the combinaisiori of :in impellei' with an inlet eye at @zieh side :md o peripheral discharge; n pressure casing surrounding the periphery of the impeiie and piovided 'with a Suitable dise'iim'ge.; :i pump easing oiming :1 suction eheiuiiei' sm'ounding; i ie. impeier :md pres-- s we easing ami provided with an inlev opening? in the piane of the impeiei and :i difioiieige opening Cmnmlmicaing with the discharge of the pressure casing; im impeiei Shaft extending through each lend of the casing; means for' removably supporting the pessuie seeing Within he pump casing; e. removfibe5 Suitably heid, smiioniiy` cheek piece :it each side engagingthe pre-@sure eas ing and piotecing the impelei'.

n a. centrifugal pump., the combination of impeler with mi ioet eye at euch side emi e. peiplemi ciiseiiai'g'a; ay pressure cus- Suiz'oundinf; he pe 5 ,iiei'y of ehe impeiiei :imi provided wiih a suit-able disehug'e; a pomp casing fomiing :i suction Chamber siiirew'ififig ille impeiei' ami pressuie and Asii'oa'lded with im iniet openiu fue piene of the impeilei" and e diseiiai'geopening eommxmienting wih fh@ (lisehnreje of iie. pressne casing, :1n iiiipeliei si' extending @'xrougii each end of the easing; means for i'emm'ebiy supporting 'che pressure casing within the pump casing; a, iemovabie suin'ey heini, stntionaiz'y. cheek piece zit each side engaging the pressure easing und proecing he impeiiex'; and mem-1s foi removeby supporting' the pres- S'me easing within he pump casing.

6. h i .i centrifugal pump, the cor'nbination :ioiy comieoining the paris oi'f the shaft; :in impeei mounted ou said sleeve amd pro vied Wih an inlet eye and periphern discharge; zi pressure casing surrounding the peiiphery of the impeiie and provided Awih suitable ciiscimige; ami :i pump meine; surioimdiiig che impeiier and progenie casing :imi pmified with un inie opening' und disA eiiige opening communicating with lz xii@- eiiaige of the pressure casing; .f1 remombie emi.' @over foi' the pump casing through which the pressure casing and impeier are accessible and remomhie; and releasnbe ineens for suppoi'ting the pressure casing from the pump casing.-

7. In a centrifugal pump, the combination oi' sin im aller with an inlet eye and periph emi disc arge; e pressure easing surrounding the periphery of the impeller and provided with a suitable discharge; cheek pieces at each side engaging the pressure casing eii'proteming the impeiler; e pump easing semounding the impeiler and pressure easing am?. giio'vide with an inlet opening and n, fiiseiiargo opening eommunicz'iting with the discharge of the pressure easing; a plurality of screws threaded through the ends nil: ihn easing and engaging the check pieees to heid them in place; and a plurigiliti7 nl serews threaded through the periphery nf the pump easing and engaging tlmx pressure raising to hold it in place.

8. In a centrifugal pumpg the rmnhinainn of a pluralityY of inipellers each with an inlei eye and peripheral dischar a prnsazure ehaniher for eavh iinpeller Hurrnunding' the periphery therenil and each prnvided with ar suitahln clisehargze; a pump waning surA1 roundingr the inipelleral and presuure caninas; a parlilinn nr partitions dividing' the pnnip easingv tn forni a separate elunnher for ach ilnpeller and its pressure Casing; an inlet; and exir for each ehanihnr, lha latter coniinuniralzing' with the pressure easing; and a pipe connecting the exit. of one, chamber with he inlet of the other,

il. In a centrifugal pump the; eninhination 0'1" a pluraiity ni' inipeih each with an inlrt eve and peripherai dissei'iargc; a pressure rliainlier for nach iinpeller Surrounding the fieriphcry thereof and, :ach provided with a laaitahle discharge; a pump fusing Surrounding the ilnpellers and pressure casings; a partition 01' partitinns dividing the pump easing to forni a sepa 'atc chamber for each iinpeller and its pressure tasing; an inlet` and exit 'for each chamber, the latter emnmnniaing with the pressure casing; an; connections and controlling means whereby h@ iinpcfllera` may bn used in series or in parallel.

lh ln a f fentrifugal }i lion, of n pump raisin l througvrh the ieevn :rehaus-A end; a diviiird f. ends; nl? ihr ahi): .annuel` y ,Y le an impeller nwunljw in 1].. In a. enul'rifuf .i np, lhe enlnliiruv tina nif a pump ranming i n inuialier innunted herein haringy an inhet aya; an axial and fadial erdeniiiinn nf linz iini'ieilnr at; tha inner Side ni the ne amending in forni in an nular l in eh pi'nxini in tha :side of #he van-ingr; and menus i" im ,ndiuing .fatzer heluce rh@ easing and Y d dink.

.in z: renlriiglal panni fille emnhinzu ip wir-ing: 1. an inipnller innuuied, exif' a mint eye; an nifial and radial e; nzinn ni' ihn impeilvr al' ihn inner side nf the. e; u axrniafilng in l'nrm an annular disk in sinne prn'ainiiiy iJn ilu; alle nf ille easing: means lnr intrmfuringi 'water barnin the -asing and said flink, and vanaf; en liu: eurer fase of said disk.

13. In a eentrifi l pump, ihn eninhination of a pump missing.; an inipnllru mounted, therein haring an inlei ein 1; un aiiiu and radial exenainn ai" the Haller ar the inner side of the eye exlendinjg in 'liniin an annular disk in Close prexiniit'y in he nii rli casing; means for in''ndiuing u'alrr habra-)nii the easing and #Said dink; and ranura nu. the, Outer faee Uf said dis-ii, an annular rhainhci.' being; formed in the easing inta which tha 'varies extend and 'um ith@ water is ind. Signed aiieu'h ...\1rj iinf this h day of Fehy. 191'?, 

